Concrete building construction.



J. A. KUIVALA. CONCRETE BUILDING CONSTRUCTION.

APPLIGATIO N FILED NOV. 7, 1911.

1,091,147, Patented Mar. 24, 1914,

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JOHN ARVID KUIVALA, OF SAN FRANCISCO, CALIFORNIA.

CONCRETE BUILDING CONSTRUCTION.

" Specification of Letters Patent.

Patented Mar. 24, 1914.

Application filed November 7, 1911. Serial No. 659,000.

To aZZ whom it may concern Be it known that I, JOHN ARVID KUIVALA, a subject to the Emperor of Russia, residing at San Francisco, county of San Francisco, and State of California, have invented certain new and useful Improvements in Concrete Building Construction, of which the following is a specification.

This invention relates to ceiling and floor construction for concrete buildings.

The object of the invention is the provision of improved means for anchoring ceilings to floors and girders and consists of floors and ceilings composed of interlocked slabs, plastic material filled reinforced girders between the floor and ceiling, and anchors of novel form combined with the ceiling slabs and reinforcing means of the girders in a novel manner, as more fully set forth hereinafter.

In the accompanying drawings :Figure 1 is a perspective looking toward a ceiling, showing how the slabs are tied and disclosing the studding between the walls; Fig. 2 a detail of one of the anchors; Fig. 3, a longitudinal section through one of the beams; Fig. 4: a plan view thereof; and Fig. 5 a cross-section through a beam showing how the anchors are secured. f

The girders 20 are of the box form, open for the reception of a concrete or cement filling which may be reinforced in different ways in addition to the trussing of the girder itself which is indicated in Figs. 3 and 4:. he ends of the girders seat upon the upper edges of the wall slabs I and the girders are provided with cross bars 21 at the upper parts of their ends and with a strut 22 under which the truss rods 23 pass, the ends of the rods being hooked or bent around the cross rods 21.

The floor slabs 24 and the ceiling slabs 25 have grooves on one edge and tongues 26 on the other edge whereby they may interlock, as shown in Fig. 1. The slabs which engage the walls may rest directly upon the upper edge of slabs 4: as shown at 27 or the slabs 4 may be provided with an extra rabbet or groove 28, Fig. l, to receive the edge of the ceiling or floor slab.

To anchor or secure the ceiling slabs 25, I provide anchors consisting of a shank 29, an eye 30, and a head having upwardly extending members or fluke's 32 which enter holes in the adjacent ends of the slabs 25, while the shank 29 extends upwardly be tween the meeting edges of the slabs 25, and the eye 30 thereof receives a tie rod 33, Figs. 3, 4 and 5, which is embedded in the cement filling of the girder 20. In Figs. 8 and 4: the number of the anchors is shown.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

In a floor and ceiling construction for buildings, the combination with a ceiling and floor each composed of interlocking slabs, of a box girder filled with a plastic material, said girder being located between and abutting the floor and ceiling, a tie rod extending longitudinally of'the girder and embedded in the plastic material filling thereof, and anchor-shaped members having fiukes which enter the meeting edge portion of adjacent slabs below the girder and having single shanks which extend upwardly between the meeting faces of the slabs and have parts engaged with the tie rod.

In testimony whereof, I hereunto aflix my signature in presence of two witnesses.

JOHN ARVID KUIVALA. Witnesses:

FRED IMsAND, W. SUVANTO.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 0! Patents, Washington, D. 0. 

